Improvement in valves for steam-engines



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IMPROVEMENT IN VALVES FOR STEAM-ENGINES.

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TO ALL WHOM IT MAY CONCERN;

vBe it known that I, JACOB SHOEMAKER, of Oakland, in the county ofArmstrong, and State of Pennsyl-- Vania, have invented a new and usefulImprovement in Steam-Engine Valves; and I do hereby declare that thefollowing is a full, clear, and exact description ofthe same,referencebeing had to the annexed drawings, making part of thisSpecification, in which- Figure 1 is a side elevation.

Figure 2, a similar elevation of the opposite side.

Figure 3, an end elevation.

Figure 4, a side elevation and section of the valve.

Figure 5, a longitudinal section of the cylinder, and

Figure 6 a similar section of the cylinder, and transverse section ofthe valve.

The same letters are employed in all'the figures in the indication ofparts which are identical.

My improvements relate to the arrangement of the valve-gear and pipes ofanoscillating steam-valve.

Ais the cylinder of a highpressure engine, into which the steam isinducted by the pipes 13 B, which lead into the tubular valve-seats O C,placed at each end of the cylinder; The cylindrical valves D are placedwithin the tubular"valve-seats. They are formed with sections of theirsides cut away at D above and below, said parts-being connected by ahole, D passing through the valve. The steam, entering the valve-seatsthrough the pipes B, gains admission to the cylinders through the portsE. The exhaust-pipe F leads from the valve-seat C on the side oppositeto the induction-pipe, and is formed by a single pipe connecting thevalve-seats,

and the steam, passing out through it, is discharged throughabranch-pipe. The steam issuing fr m the ports reaches the eduction-pipeby passing through the hole D An oscillating motion is communicated tothe valyes, forming alternately a communication from the induction-pipeto the port, and from the port-to the eduction-pipe, by levers G,actuated by. the eccentric-rod H.

Instead of the lever H, the valve-stems may have pinions on-their ends,operated by a ratchet-gear on the eccentric-rod, whichreceives areciprocating motion, in the usual manner, from an eccentric on the mainshaft.

' What I claim as my invention, and desire to secure by Letters Patent,is-- The arrangement of the induction-pipe B and the eduetion-pipeF-with reference to the valve-seat 0,-valve D, and ports E, whenconstructed substantially inthe manner set forth.

In testimony whereof, I have signed my name to this specification in thepresence of twosubscribing witnesses.

JACOB SHOEMA'KER. Witnesses:

J. C. GRAY, PETER. GRINDER.

